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Oxide charge evolution under crystallization of amorphous Li–Nb–O films
Despite the important role being played by the oxide charge in ferroelectric memories the origin and distribution of this charge in LN-based heterostructures during the crystallization of LN films are not clear yet. The present work is aimed to investigate how the oxide charge evolves during the crystallization of amorphous LieNbeO films deposited onto Si substrates.
3/17/2021 8:27:23 PM +00:00
Effect of hydrothermal temperature treatment on the variance of fluorescence in Ca2SiO4:Tb3
Investigations of structural defects and their associated impact on the optical properties of optical materials are essential expediencies because different methods are involved in the preparation of those materials for display applications.
3/17/2021 8:27:16 PM +00:00
Phytochemical mediated synthesis of ZnO:Dy3 nanophosphors: Judd–Ofelt analysis, structural and spectroscopic properties
In the present work, ZnO:Dy3 nanophosphors were synthesized by a simple, cost effective and ecofriendly route using the aqueous extract of Azadirachta Indica leaves. The prepared ZnO:Dy3 nanophosphors were characterized using X-ray diffraction (XRD), Fourier Transformed Infra-Red (FTIR), Raman, UV-VIS diffuse reflectance (UVDR) spectroscopy and Photoluminescence (PL), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray spectroscopy (EDX).
3/17/2021 8:27:08 PM +00:00
pH-responsive carboxylic cellulose acetate nanoparticles for controlled release of penicillin G
In this study, pH responsive carboxylic cellulose acetate nanoparticles (CCA NPs) have been evaluated as drug nanocarriers for controlled release of drug . Herein, carboxylic cell ulose acetate ( CCA) was initially synthesized via oxidation of cellulose using a 2,2 ,6,6-tetramethylpiperidin-1-yl)oxidanyl (TEM PO) as an oxidant and followed by the acetylation of carboxylic cellulose in the presence of iodine as a catalyst.
3/17/2021 8:26:58 PM +00:00
Indirect determination of dopamine and paracetamol by electrochemical impedance spectroscopy using azo coupling reaction with oxidized 2,4-din itrophenylhydrazine (DNPH): Application in commercial tablets
A new method for the determination of dopamine (DA) and paracetamol (PCT), based on the azo “coupling reaction with oxidized 2,4-dinitrophenylhydrazine (DNPH), has been established. This method was based on the fact that in the HCl buffer solution, potassium ioadate oxidized 2,4- dinitrophenylhydrazine to form the diazonium chloride at 0e5oC and then the diazonium ion reacted with the phenolic compounds to form azo-compounds
3/17/2021 8:26:51 PM +00:00
Fabrication of co-cultured tissue constructs using a dual cell seeding compatible cell culture insert with a clip-on scaffold for potential regenerative medicine and toxicolog ical screening applications
Tissue engineering is emerging as a modern medicine fascination towards the establishment of human tissue banks; yet, these approaches typically involve cultures of only one type of cell and, therefore, do not recapitulate the native tissue physiology in toto. Co-culture models, comprised of different cell types, can potentially create the next level of complexity. However, conventional approaches involving multiple cell types and cell culture inserts do have limitations.
3/17/2021 8:26:42 PM +00:00
Low operating voltage resistive random access memory based on graphene oxide–polyvinyl alcohol nanocomposite thin films
In this study, we have fabricated and investigated the resistive switching behavior of an RRAM device using the nanocomposite of polyvinyl alcohol (PVA) and graphene oxide (GO) as the switching layer in a hybrid Ag/PVAeGO/FTO structure. The resistive switching behavior of the hybrid Ag/PVAeGO/ FTO device depends on the GO amount in the PVAeGO matrix.
3/17/2021 8:26:29 PM +00:00
Performance analysis of HfO2/InAlN/AlN/GaN HEMT with AlN buffer layer for high power microwave applications
We present a performance enhancement evaluation of n þ doped graded InGaN drain/source regionbased HfO2/InAlN/AlN/GaN/AlN on SiC metal-oxide-semiconductor high electron mobility transistor (MOS-HEMTs) with a T-shaped gate. Impact on the device characteristics with the inclusion of a HfO2 surface passivation layer and an AlN buffer layer in the MOS-HEMT structure as a performance booster has been analyzed for the HEMT device with 30 nm gate length using Silvaco ATLAS TCAD.
3/17/2021 8:26:20 PM +00:00
Fabrication and characterization of green synthesized ZnO nanoparticle based dye-sensitized solar cells
In the present study, we report on the synthesis of ZnO nanoparticles using Tilia Tomentosa (Ihlamur) leaves extract followed by calcination at 400 C for 15 min. The prepared ZnO nanoparticles were characterized by XRD and SEM to study the phase and microstructure, respectively. The XRD analysis showed the absence of impurity peaks and the SEM image confirmed the spherical nature of the prepared ZnO nanoparticles with an average particle size of 80 nm.
3/17/2021 8:26:12 PM +00:00
Balance between the explored Pt counter electrode in an electrolyte medium and the photoanode for highly efficient liquid-junction photovoltaic devices
This work investigates the effect of the ratio of the explored Pt area in the electrolyte medium and the photoanode area (REP) on the performance of dye-sensitized solar cells (DSCs). It is found that the power conversion efficiency of DSCs increases by the ascending REP.
3/17/2021 8:26:05 PM +00:00
A controlled process of atomic-scale material design via temperature-mediated grain refinement of NiCo2O4 rods for capacitive energy storage
We report on a controlled process of atomic-scale material design based on calcination-temperatureinduced structural variation and its influence on capacitive energy storage characteristics of spinelstructured NiCo2O4 rods (NCOR). Precisely, morphology-tuned NCOR were grown through a facile solvothermal process followed by a controlled calcination.
3/17/2021 8:25:56 PM +00:00
Three-dimensional lion's mane like AlV3O9 deposited on graphene surface for supercapacitors with a promising electrochemical performance
3D lion's mane like AlV3O9 microspheres deposited on the well-exfoliated graphene were successfully synthesised through a facile solvothermal method where the graphene sheet was prepared solely via the liquid phase exfoliation process. The highly electrical conductive graphene was introduced as a conductive substrate or a backbone to support the diffusion of the electrolyte ions (OH-).
3/17/2021 8:25:46 PM +00:00
Phase segregation controlled semiconductor crystallization for organic thin film transistors
In this article, we provide an in-depth review of important works on phase segregation which occurs as a result of mixing organic semiconductors with polymeric additives. Throughout the discussion, the indispensable correlations among phase segregation, crystal growth, layer structure and film morphology are showcased using specific examples that mainly entail small-molecule organic semiconductors such as 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) and 2,8-difluoro-5,11- bis(triethylsilylethynyl)anthradithiophene (diF-TES-ADT).
3/17/2021 8:25:38 PM +00:00
Silver nanoparticles as a bifunctional probe for label-free and reagentless colorimetric hydrogen peroxide chemosensor and cholesterol biosensor
A colorimetric chemosensor for hydrogen peroxide (H2O2) and biosensor for cholesterol is developed in this work following a ‘label-free and reagentless’ concept. In this strategy, silver nanoparticles (AgNPs) are used as a bifunctional probe, namely, a chemical capture probe for H2O2 recognition and a signal probe for displaying detection results. The working principle of these colorimetric sensors is based on the redox reaction between AgNPs and H2O2
3/17/2021 8:25:20 PM +00:00
Highly conducting solid electrolyte films based on PVA and iron alum: Synthesis, characterization and electrical properties
Excellent conducting solid polymer electrolyte films were prepared by using Polyvinyl alcohol (PVA) and Iron alum through a reactive blending process. The effect of the concentration of the iron alum on the conducting behavior was studied in detail by varying the concentration of the alum in the PVA matrix. The functionality was studied using the Infrared (FT-IR) spectroscopic technique.
3/17/2021 8:25:09 PM +00:00
Green synthesized spinel lithium titanate nano anode material using Aloe Vera extract for potential application to lithium ion batteries
The lithium titanate (LTO) nanoparticles have been prepared by a chemical and green synthesis method and characterized by XRD, FE-SEM, FTIR, Raman, CV and EIS analysis. The XRD result ensured that the LTO exhibits a cubic spinel structure with the space group of Fd3m. The surface morphology of the prepared anode materials has been studied by FE-SEM and TEM analysis.
3/17/2021 8:25:01 PM +00:00
First-principles studies of thermoelectric and thermodynamic properties of the complex perovskite Ba3MnNb2O9
The structural, electronic, magnetic, thermoelectric and thermodynamic properties of Ba3MnNb2O9 have been investigated using the full-potential linearized augmented plane wave method. Besides, the thermodynamic properties of the materials of interest have been studied using the quasi-harmonic Debye model accommodating the lattice vibrations effects.
3/17/2021 8:24:53 PM +00:00
Enhancement of electrical properties of NASICON-type solid electrolytes (LiSn2P3O12) via aluminium substitution
NASICON-type electrolyte is one of the possible solid-state electrolytes to be employed in solid-state energy devices. The Li1xAlxSn2-xP3O12 NASICON-based solid electrolyte materials were fabricated using a mechanochemical milling method at 650oC for 8 h, where x is from 0 to 0.8. From the X-ray diffraction (XRD) analysis, the crystallographic phases of the parent material and the partial aluminium (Al) substituted one have been verified.
3/17/2021 8:24:45 PM +00:00
Hydrogen evolution reaction at extreme pH conditions of copper sulfide micro-hexagons
Electrochemical hydrogen evolution reaction (HER) using non- precious comp ounds has gained substantia l interest in the development of water electrolyzers. Herein, we report the synthesis of Copper sulfide (Cu2S) micro-hexagons via a hydrothermal method, followed by some of the important physiochemical characterizations and electrochemical measurements towards the HER.
3/17/2021 8:24:33 PM +00:00
Giant magnetoelectric effects in serial-parallel connected Metglas/PZT arrays with magnetostrictively homogeneous laminates
To ensure the magnetostrictive softness, the homogeneity, the decrease of the shear-lag effect and the space-saving construction of narrowed longitudinal-transverse L-T magnetoelectric (ME) composites, a novel parallel-connected-multi-bars (PCMB) geometry of PZT/Metglas is proposed and investigated by simulation and experiment.
3/17/2021 8:24:25 PM +00:00
Polylactic acid microparticles embedded porous gelatin scaffolds with multifunctional properties for soft tissue engineering
Suitable three-dimensional scaffolds showing controllable drug delivery properties, known as multifunctional scaffolds, have gained increasing interest for soft tissue engineering. Here, tetracycline hydrochloride-encapsulated polylactic acid (TCH-PLA) microparticles prepared by using the double emulsion/solvent evaporation method were incorporated into a gelatin matrix.
3/17/2021 8:24:17 PM +00:00
Modified pencil graphite electrode as a low-cost glucose sensor
A manganese oxides mediator was electrodeposited onto a low-cost pencil graphite electrode (PE) from an easily available and affordable potassium permanganate precursor. The modified manganese oxides coated PE (MnOxides/PE) was previously utilized as a hydrogen peroxide sensor according to its electrocatalytic activity for hydrogen peroxide oxidation in an ammonium buffer (pH 9.0) medium.
3/17/2021 8:24:08 PM +00:00
Optical, electrical and electrochemical properties of PCL5/ITO transparent conductive films deposited by spin-coating ‒ Materials for single-layer devices
In this paper, we report on the synthesis of solid polymer electrolytes (SPEs) on the basis of 95 wt.% PEO and 5 wt. of anhydrous cobalt (II) chloride hexahydrate (CoCl2 6H2O), hereafter called PCL5, by the spin-coating technique using different types of glass (normal, quartz, ITO) substrates. The PCL5 electrolyte exhibits the highest conductivity and the lowest optical bandgap and hence, it was selected as a component to fabricate the organic single-layer device.
3/17/2021 8:23:58 PM +00:00
Electrophoretic graphene oxide surface passivation on titanium dioxide for dye sensitized solar cell application
It suggested that the probability of photo-generated electron tunneling from dye to TiO2 was suppressed by increasing the thickness of the GO layer. Presented results assure that GO can be considered as a competitive surface passivation candidate for nanostructured excitonic solar cells.
3/17/2021 8:23:51 PM +00:00
Visible-light-induced photo-Fenton degradation of rhodamine B over Fe2O3-diatomite materials
Diatomite is mined in Phu Yen province, Vietnam and the Fe2O3-diatomite materials are synthesized by a simple process for the photo-Fenton reaction of rhodamine B (RhB) degradation. The pure diatomite and Fe2O3-diatomite materials have large pore structures representing the high adsorption ability and effi- cient photocatalysis.
3/17/2021 8:23:43 PM +00:00
Advances in numerical approaches for microfluidic cell analysis platforms
This paper systematically reviews the capability of numerical approaches in developing efficient microfluidic technologies for cell analysis. Moreover, this paper provides an initial insight for researchers who are interested in establishing numerical approaches for microfluidic cell analysis platforms.
3/17/2021 8:23:33 PM +00:00
Advances in three-dimensional nanostructures for intracellular recordings from electrogenic cells
This work also highlights the latest advances in 3D nanostructures for recording the intra-cellular activity of cultured neurons and cardiomyocytes with a focus on emerging 3D structures and strategies aimed at improving efficiency and long-term integration with cultured electrogenic cells.
3/17/2021 8:23:22 PM +00:00
Room temperature synthesis of biocompatible nano Zn-MOF for the rapid and selective adsorption of curcumin
Nanoscale metal-organic frameworks (MOFs) have appeared as potential materials in biomedical and sensing applications. In this work, a nano Zn-BDC-NH2 encoded MOF was effectively synthesized using the co-surfactants strategy and characterized for the curcumin adsorption.
3/17/2021 8:23:15 PM +00:00
Hybrid heterostructures of graphene and molybdenum disulfide: The structural characterization and its supercapacitive performance in 6M KOH electrolyte
In this article, heterostructures from graphene ( G) and molybdenum disulfide (Mo S2) were used as electrode materials in a hybrid supercapacitor. A general and facile method for the preparation of a G/ MoS2 hybrid supercapacitor has been developed. Using a slurry technique, the G/MoS2 hybrid supercapacitor electrode was fabricated and its electrochemical performances in aqueous solution were investigated.
3/17/2021 8:23:07 PM +00:00
Smart flower like MgO/Tb,Eu-substituted hydroxyapatite dual layer coating on 316L SS for enhance d corrosion resistance, antibacterial activity and osteocompatibility
To promote and enhance the biological responses of implant hydroxyapatite (HAP) coatings, these are modified by substitution with various ions for the development of bioactive bone implants. In the present work, we have fabricated a MgO/Tb,Eu-HAP dual substituted hydroxyapatite coating on borate passivated 316L stainless steel (316L SS) by the electrodeposition method.
3/17/2021 8:22:54 PM +00:00